**** ussd competition

I want my airtime back,i bought two litre coke and noticed that there is an airtime competition goin on,,i have two lids from two litre coke buy they both say invalid,i tried numerous times times till my airtime was gone lots of it too cause of your **** competition nd your incompetance,i want my airtime back pls ********** 211 airtime wasted for nothing,all caps nd the codes say invalid